body{
    font-family: Arial;
    background: #f4f4f4;
    text-align: center;
}

header{
    background: #222;
    color: white;
    padding: 20px;
}

section{
    margin: 20px;
    padding: 20px;
    background: white;
    border-radius: 10px;
}

button{
    padding: 10px 20px;
    cursor: pointer;
}